For the following problem, How do I find the vapor pressure of water? Pressure=7

Question

For the following problem,

How do I find the vapor pressure of water? Pressure=762.2 mmHg and temperature= 298K

Any help is greatly appreciated.

Question for Group Work 5.150 Hydrogen peroxide (H2 O2) decomposes in the presence of a catalyst to form water and oxygen. The catalyst is added to 5.00 mL of a hydrogen peroxide solution at 25.0 C, and 49.2 mL of gas is collected over water at a total pressure of 762.2 mmHg. Part A Write and balance the chemical reaction (note: catalysts do not appear in balanced chemical equations) Express your answer as a chemical equation including phases 2H02(a)2H20)+02(8 Submit My Answers Give Up Correct

Explanation / Answer

Total pressure = 762.2mmHg

water vapor pressure at 250C   = 23.8mmHg

pressure of O2   = total pressure - water vapor pressure

                           = 762.2-23.8 = 738.4mmHg

2H2O2 (aq) --------------> 2H2O(l) + O2(g)

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